Which structure develops first in a deuterostome?
a. anus
b. mouth
c. limbs
d. heart
a. anus
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A human mother’s genes seem to influence brain development while a human father’s genes seem to influence growth. What does this imply?
A. The mother imprints her brain development genes and the father imprints his growth genes. B. The mother imprints her growth genes and the father imprints his brain development genes. C. Mothers and fathers both imprint brain development genes. D. Brain development genes are present in the mitochondria, while growth genes are present in the nucleus. E. Brain development genes are on the X chromosome and growth genes are on the Y chromosome.
A tuna is a ____ fish
a. ray-finned b. lobe-finned c. cartilaginous d. jawless e. invertebrate
In a line graph, the value of the independent variable is:
a. represented on the y-axis. b. represented as bars extending from the y-axis. c. represented as long lines extending from the right side of the graph. d. represented on the x-axis. e. represented as "slices in a pie."
Which of these conclusions cannot reasonably be drawn from the graph?
A) Protein production occurs throughout the cell cycle. B) An increase in ribosomal activity occurs as a cell prepares to divide. C) Cells export a large amount of protein following cell division. D) There is always a supply of amino acids in the cell.